| 1 | Amax Oil & Gas Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
| 2 | Belden & Blake Corporation | North Canton, OH 44720-0500-0500 | Oil & Gas Operator | Dec 2016 |
| 3 | Block T Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Jul 2024 |
| 4 | Carter Oil Co | | Oil & Gas Operator | Dec 2013 |
| 5 | Cedarhill Operating Company, L.L.C. | | Oil Operator | Dec 2007 |
| 6 | Choctaw Holdings, Inc. | | Oil Operator | Dec 1974 |
| 7 | Crosbys Creek Oil & Gas, LLC | Ridgeland, MS 39157 | Oil & Gas Operator | Jun 2024 |
| 8 | Daybreak Oil And Gas, Inc. | | Oil & Gas Operator | Oct 2024 |
| 9 | Escambia Operating Co. LLC | Gulfport, MS 39501 | Oil & Gas Operator | Jul 2024 |
| 10 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 11 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 12 | Harkins & Co. | | Oil & Gas Operator | Oct 1986 |
| 13 | Highland Oil Co. | | Oil Operator | Mar 1953 |
| 14 | Houser, R. G. | | Oil Operator | Mar 1953 |
| 15 | Howell Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Oct 2015 |
| 16 | Hughes Petroleum Corp. | | Oil Operator | Dec 1972 |
| 17 | Humble Oil & Refining Co. | Houston, TX 77252 | Oil & Gas Operator | Jan 2000 |
| 18 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Dec 2024 |
| 19 | J. R. Pounds, Inc. | Laurel, MS 39441 | Oil & Gas Operator | Sep 2024 |
| 20 | JL Resources, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Dec 2024 |
| 21 | Johnson, Larry L. & Williams, Earl | | Oil Operator | Dec 1967 |
| 22 | Kelton Co. | | Oil Operator | Dec 1964 |
| 23 | Kelton Operating Co., Inc. | | Oil Operator | Jul 1991 |
| 24 | Ladd Petroleum Corp. | Denver, CO 80202 | Oil & Gas Operator | Oct 2004 |
| 25 | Lower 15 Oil Corporation | Gilbertown, AL 36908 | Oil & Gas Operator | Jul 2024 |
| 26 | McPhearson, Richard E. | | Oil Operator | Mar 1956 |
| 27 | Midroc Operating Co. & Watkins, H. Vaughan, Jr. | | Oil & Gas Operator | Feb 2010 |
| 28 | Midroc Operating Co. & Watkins, H. Vaughan, Jr. & Placid Oil Co. | | Oil & Gas Operator | May 1991 |
| 29 | Midroc Operating Company | | Oil & Gas Operator | Apr 2013 |
| 30 | Oglesby, Marshall | | Oil Operator | May 1990 |
| 31 | Pete'S Pumping & Well Services, LLC | Butler, AL 36904 | Oil & Gas Operator | Jul 2024 |
| 32 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 33 | Placid Oil Company | Houston, TX 77227 | Oil & Gas Operator | Mar 2008 |
| 34 | Pruet & Hughes | | Oil & Gas Operator | Jul 1977 |
| 35 | Pruet & Hughes Co. | | Oil & Gas Operator | Jan 1978 |
| 36 | Pruet & Hughes Operating Co. | | Oil & Gas Operator | May 1981 |
| 37 | Pruet Production Co. | Jackson, MS 39201 | Oil & Gas Operator | Sep 2024 |
| 38 | Ram Petroleum, LLC | Tylertown, MS 39667 | Oil & Gas Operator | Oct 2024 |
| 39 | Reliance Trust | | Oil Operator | Dec 1960 |
| 40 | Roundtree & Associates, Inc. | | Oil & Gas Operator | Jun 2024 |
| 41 | Signal, LLC | | Oil & Gas Operator | Sep 2024 |
| 42 | Skelton, D.W. | | Oil Operator | Dec 1952 |
| 43 | Tecton Energy Operating LLC | | Oil Operator | Apr 2009 |
| 44 | Union Pacific Resources Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2002 |
| 45 | Valence Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | Dec 2024 |
| 46 | Venture Oil & Gas, Inc. | Laurel, MS 39440 | Oil & Gas Operator | Sep 2024 |
| 47 | Vintage Petroleum, Inc. | Houston, TX 77046 | Oil & Gas Operator | Sep 2024 |
| 48 | West Barrytown Services, LLC | Gilbertown, AL 36908 | Oil & Gas Operator | Mar 2020 |